"One of the more obscure wreckers—or vehicles of any sort—of WWII is the C2 Truck-Tractor. The Federal Model 606 truck was equipped with a Gar Wood US6T26 hoist, and was designed to be used in conjunction with a trailer for aircraft recovery and maintenance. Here one of the trucks is used to dismember a downed 8th Air Force B17 in England. National Archives"
source